MYSQL数据库练习题(50道)
-- 数据表介绍
-- 1.学生表Student(SId,Sname,Sage,Ssex)
-- SId 学生编号,Sname 学生姓名,Sage 出生年月,Ssex 学生性别
-- 2.课程表Course(CId,Cname,TId)
-- CId 课程编号,Cname 课程名称,TId 教师编号
-- 3.教师表Teacher(TId,Tname)
-- TId 教师编号,Tname 教师姓名
-- 4.成绩表SC(SId,CId,score)
-- SId 学生编号,CId 课程编号,score 分数
-- 创建数据库test01
CREATE DATABASE test01;
-- 打开test01数据库
USE test01;
-- 学生表 Student
create table Student(SId varchar(10),Sname varchar(10),Sage datetime,Ssex
varchar(10));
insert into Student values('01' , '赵雷' , '1990-01-01' , '男');
insert into Student values('02' , '钱电' , '1990-12-21' , '男');
insert into Student values('03' , '孙风' , '1990-12-20' , '男');
insert into Student values('04' , '李云' , '1990-12-06' , '男');
insert into Student values('05' , '周梅' , '1991-12-01' , '女');
insert into Student values('06' , '吴兰' , '1992-01-01' , '女');
insert into Student values('07' , '郑竹' , '1989-01-01' , '女');
insert into Student values('09' , '张三' , '2017-12-20' , '女');
insert into Student values('10' , '李四' , '2017-12-25' , '女');
insert into Student values('11' , '李四' , '2012-06-06' , '女');
insert into Student values('12' , '赵六' , '2013-06-13' , '女');
insert into Student values('13' , '孙七' , '2014-06-01' , '女');
-- 科目表 Course
create table Course(CId varchar(10),Cname nvarchar(10),TId varchar(10));
insert into Course values('01' , '语文' , '02');
insert into Course values('02' , '数学' , '01');
insert into Course values('03' , '英语' , '03');
-- 教师表Teacher
create table Teacher(TId varchar(10),Tname varchar(10));
insert into Teacher values('01' , '张三');
insert into Teacher values('02' , '李四');
insert into Teacher values('03' , '王五');
-- 成绩表 SC
create table SC(SId varchar(10),CId varchar(10),score decimal(18,1));
insert into SC values('01' , '01' , 80);
insert into SC values('01' , '02' , 90);
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